On Thu, Nov 30, 2023 at 01:36 PM, drscrowe wrote:
if a valve had low compression, it would need a new engine instead of shims. The reasoning was that little rubber bits around the valves would tear up during the adjustment, and it would kill the valve and you'd be back to engine replacement anyhow.
This does not make mechanical sense. Maybe there was a miscommunication along the way?
I can imagine if they find low compression and find it's due to a valve or valve seat that has been damaged by lack of adjustment, then they'd rather just
replace the whole engine rather than removing the cylinder head(s) and having a "valve job" done on them.
Perhaps that's what they meant to communicate.
The valve adjustment itself (if done properly) will not harm the engine in any way.? But it is expensive and cannot correct any
damage that may have already been done.
It's too bad your mechanic didn't do the compression test while he was changing the spark plugs. That would have been the opportune time.
Good luck,
Buzz L.
Phoenix, AZ
Former '86 Dolphin 500 owner
